I really hate the discourse around this stuff. Like, yes, disguising murder as suicide is a thing and obviously three-letters agencies do it.
But someone saying publicly they're not suicidal gives you close to zero information. People with suicidal ideation almost never advertise it publicly because, one, there is a heavy amount of social stigma attached to it, and two, publicly declaring you're suicidal is a good way to get involuntarily committed to a mental health institution.
I see a ton of jokes on social media that go "remember, X is not suicidal". How the fuck would you know? This discourse is so disrespectful to people struggling with suicidal thoughts.